Curcumin Protects Skin against UVB-Induced Cytotoxicity via the Keap1-Nrf2 Pathway: The Use of a Microemulsion Delivery System

Figure 7

Organ cultures were treated with microemulsions for 24 h and then irradiated with UVB at 300 mJ/cm², and cell apoptosis was evaluated by caspase-3 activity assay 24 h after irradiation. Data were normalized on the basis of untreated (control), nonirradiated skin (equal to 1). Average values are presented in the figure with standard deviation of the mean ().